Simply manually shake the handle clockwise with your hand to achieve the desired alarm effect when the speed reaches the primary level (50-80 revolutions per minute)

Strong sealing product, waterproof and dustproof, stable performance

The aluminum alloy shell is made of aluminum alloy die-casting, which is corrosion-resistant, moisture-proof, and durable

Strong penetration can produce sharp alarm sounds, with great shock and easy detection of alarms in a timely manner